Comparison of speech intelligibility between normal headsets and bone conduction hearing devices at call center

Size: px
Start display at page:

Download "Comparison of speech intelligibility between normal headsets and bone conduction hearing devices at call center"

Transcription

1 Comparison of speech intelligibility between normal headsets and bone conduction hearing devices at call center Setsuo MAEDA 1, Koji KOBAYASHI 2, Hidenori NAKATANI 3, Akiko NAKATANI 4 1 Kinki University 2 Toyota Tsusho Corporation 3, 4 Goldendance Co., Ltd. ABSTRACT The purpose of this paper is to clarify the difference of speech intelligibility between the normal headsets and the bone conduction hearing devices. From the research results of the assessment of noise exposure of call center operators with wearing the headsets, the risk of hearing damage in call centers has been found out. Also, it has been found that the bone conduction hearing devices is better equipment than normal headsets for prevention of hearing loss of call-center operators. But, the difference of speech intelligibility between normal headsets and bone conduction hearing devices does not clear exactly yet. In this paper, the comparison experiment of speech intelligibility between normal headsets and bone conduction hearing devices at call-center was carried out at the laboratory. It was clear that the speech intelligibility had almost the same between normal headsets and bone conduction hearing devices. It was also clear the bone conduction hearing devices are able to use instead of the normal headsets without hearing loss damages at the call center. Keywords: Speech Intelligibility, Bone Conduction Devices, Headset Number(s): 63.3 I-INCE Classification of Subjects 1. INTRODUCTION Call centers are the rapid growth communication industries in the world. From the research results of the assessment of noise exposure of call center operators with wearing the headsets, the risk of hearing damage in call centers has been found out (1-5). And one paper suggested that, therefore, the risk for call center operators should be seriously assessed. Also, although the method of the prevention of Hand-Arm Vibration Syndrome has been proposed by a researcher (6), the realization of the devices does not yet. On the other hand, the bone conduction devices to hear the voice or music are developing by many industries. The usefulness of bone conduction devices to use at working under noisy high way and tunnel, production line at iron factory, production line at car manufacture, work at airfield have been reported. And also, the usefulness of the bone conduction devices has been reported for prevention of hearing loss (7). But, the performance of speech intelligibility between normal headsets and bone conduction hearing devices does not clear exactly yet. The purpose of this paper is to clarify the performance of speech intelligibility between normal headsets and bone conduction hearing devices used at the operation of the call center by using the STI (Speech Transmission Index) (8) and the category judgment method (9). 1 maeda@socio.kindai.ac.jp 2 koji_kobayashi@toyota-tsusho.com 3 nakatani@goldendance.co.jp 4 a-nakatani@goldendance.co.jp Inter-noise 2014 Page 1 of 7

2 Page 2 of 7 Inter-noise DIFFERENCES OF HEARING 2.1 Ordinary Hearing Process As shown in Fig. 1, the humans are hearing the sounds through both our bones (bone-conducted or bone transmitted) and the eardrums (air-conducted or air-transmitted). Most of sounds are heard by the eardrums. The eardrum converts the sound waves to vibrations and transmits them to the cochlea (or inner ear). Figure 1 - Ordinary hearing process 2.2 Bone Conduction Process As shown in Fig. 2 of the bone conduction listening, the bone conduction devices decode sound waves and convert them into vibrations that can be received directly by cochlea so the eardrum is never involved. The sound reaches the eras as vibrations through the bones (or skull) and skin. Figure 2 - Bone conduction process Page 2 of 7 Inter-noise 2014

3 Inter-noise 2014 Page 3 of 7 3 EXPERIMENTS 3.1 Used ordinary headset and bone conduction headset at call centers Fig.3 and Fig.4 show the headsets used in this experiment. Fig.3 is the ordinary headset at call center. This is widely using at call center in Japan. Figure 3 - Example of ordinary headset at call centers Fig.4 is the alternative headset such as the bone conduction headset used in this experiment. frequency range of both headsets is almost the same frequency range between Hz. The Figure 4 - Example of bone conduction headset at call centers 3.2 Stimuli The reading of the woman who had recorded from the frequency modulation broadcasting program of NHK (anthology "[Kaicyouon]. ") was chosen from the sound source of our hearing always as an original sound to make the examination sound. And, the PCM recording method to convert the audio signal in A/D because the tone quality when recording and reproducing was not decreased, and to memorize as a digital signal was adopted. The recording time is 11.6 seconds, and the speech rate is 5.3 characters/second. An original sound was processed adding the reverberation of two kinds of the condition directly electrically under 10 kinds of conditions by the combination of the sound by two mixing ratio kinds of, and the stimulus sound was produced. And the sound level controlled at 85 dba by using the level controller of the personal computer. The 85dBA sound level is Occupational exposure limits for continuous or intermittent noise by A-weighted sound pressure level of Recommendation of Occupational Exposure Limits ( ) of The Japan Society for Occupational Health (10). The level of the bone conduction headset was controlled by the equalization method (11). In this paper, the conditions as shown in Table 1 used to get the performance of the speech intelligibility test between the normal headsets and bone conduction devices. Inter-noise 2014 Page 3 of 7

4 Page 4 of 7 Inter-noise 2014 Table 1 STI conditions of used experiment. Stimulus STI No In general, the relation between STI value and articulation is clarified as shown in figure in Fig.5 (8). Figure 5 - Relation between STI value and Speech Intelligibility Therefore, the value of STI is thought for the articulation (easiness to catch) to the range from 0.28 to 1.00 to become very, and to be able to clarify the difference of bone conduction headphone and normal headphone. 3.3 Subjects The test subjects were 12 people (6 males and 6 females). Their ages were between 20 to 60 years old. These subjects confirmed an audiometry was done beforehand, and abnormality was not found in hearing. This experiment was approved by the experimental ethics committee, which consisted of members of Kinki University, medical doctors and commoners. 3.3 Experimental procedures The category judgment method was used to obtain the performance of the speech intelligibility. The seven categories were used for the evaluation of speech intelligibility in this experiment. 7: Extremely easy 6 : Very easy 5 : Fairly easy 4 : Average 3 : Fairly difficult 2 : Very difficult 1 : Extremely difficult Page 4 of 7 Inter-noise 2014

5 Inter-noise 2014 Page 5 of 7 The STI levels of the speech signals were varied over a range of 10 steps as shown in Table 1. These signals were each used five times, comprising a total of 50 stimuli applied in random order, as shown in Fig. 6, each applied for a duration of about 12 seconds with a five-second pause between stimuli for each subject in the experiment. 50 stimuli (10 conditions x 5 repetitions) were presented. The each stimulus level was assumed LAeq=77.5±2.5dB. The subjects got the stimulus sound from the normal headphone the bone conduction headphone shown in Fig.7 and Fig.8 one by one, and judged whether each stimulus speech belongs to the category of the judgment category of seven stages. STI S1 S2 Si=signal(i=1 50) S50 Figure 6 Sequence of stimuli Figure 7 Normal headphone Figure 8 Bone conduction headphone Inter-noise 2014 Page 5 of 7

6 Page 6 of 7 Inter-noise RESULTS AND DISCUSSIONS The performance of the speech intellibility of a bone conduction headphone and a normal headphone was shown from Fig.9 in Fig.11. Fig.8 showed the mean value of all subject of the category judgment result. It was clarified that there was no difference between a bone conduction headphone and a normal headphone from outcome of an experiment from the results of Fig.9 to Fig.11 for the speech intelligibility. However, it was clarified that the speech intelligibility of the bone conduction headphone was higher when examining it as the male and female divided the subject. Generally, when the value of STI becomes 0.5 or less, it is clarified that the person of 50% or more passes the judgment "It is difficult to catch" to the speech. Moreover, the judgment that belongs from Average" to "Fairly easy" is clarified when it is larger than 0.5. It is clear in both a bone conduction headphone and a normal headphone that speech intelligibility has divided on the boundary of STI=0.6 from Figure 8 to Figure 10 of this outcome of an experiment. 7 : Extremely easy 6 : Very easy 5 : Fairly easy 4 : Average 3 : Fairly difficult 2 : Very difficult 1 : Extremely difficult NH: Normal Headphone BCH: Bone Conduction Headphone Figure 9 Relationship between Category and STI of all subjects Figure 10 - Relationship between Category and STI of male subjects Page 6 of 7 Inter-noise 2014

7 Inter-noise 2014 Page 7 of 7 Figure 11 - Relationship between Category and STI of female subjects 5 CONCLUSIONS The following was clarified by the current experiment. a. There were no difference of speech intelligibility between bone conduction headphone and normal headphone. However, it was clarified that the female speech intelligibility of the bone conduction headphone was higher than male subject results. b. The speech intelligibility of the boundary of Average was STI=0.6 in both a bone conduction headphone and a normal headphone. REFERENCES 1. J.A. Patel and K Broughton, Assessment of the Noise Exposure of Call Centre Operators, Ann. Occup. Hyg., 46(8), HSE, Ergonomics of using a mouse or other non-keyboard input device, Health and Safety Executive, Research Report 045, HSE, Psychological risk factors in call centres: An evaluation of work design and well-being, Health and Safety Executive, Research Report 169, K.A. Broughton, The Health and Safety Executive s call centre research: the British Experience, Proceedings of INTER-NOISE 2003, A Peretti, P, P Nataletti, A Pieroni, R Sisto, F Pedrieli, A Farina, Occupational noise exposure for call-center workers, Proceedings of INTER-NOISE 2007, P.A.T, Human Body Vibration Evaluation Devices and Hand-held Vibration Tool, PCT/JP98/05293, WO00/31507, S Maeda et al, Comparison of TTS between normal headphones and bone conduction devices for prevention of hearing loss at call-center, Proceedings of of internoise2012 (CD-ROM), S Maeda and T Nakajima, A Study by Method of Category Judgment on Evaluation of Speech Intelligibility, Faculty of Science and Technology review of Kinki University, No.20, 1984, p JP Guilford, Psychometric methods, McGraw Hill, New York, Recommendation of Occupational Exposure Limits ( ), The Japan Society for Occupational Health, J Occup Health, 52, Y Yae, F Nakahara, H Nakatani, K Kobayashi, Y Chisaki, T Usagawa, On acoustic signal presentation by means of bone conduction actuator Preliminary measurement of threshold and loudness, The Institute of Electronics, Information and Communication Engineers Technical Report, EA ( ), Inter-noise 2014 Page 7 of 7

Reference: Mark S. Sanders and Ernest J. McCormick. Human Factors Engineering and Design. McGRAW-HILL, 7 TH Edition. NOISE

Reference: Mark S. Sanders and Ernest J. McCormick. Human Factors Engineering and Design. McGRAW-HILL, 7 TH Edition. NOISE NOISE NOISE: It is considered in an information-theory context, as that auditory stimulus or stimuli bearing no informational relationship to the presence or completion of the immediate task. Human ear

More information

THE MECHANICS OF HEARING

THE MECHANICS OF HEARING CONTENTS The mechanics of hearing Hearing loss and the Noise at Work Regulations Loudness and the A weighting network Octave band analysis Hearing protection calculations Worked examples and self assessed

More information

Influence of Frequency on Difference Thresholds for Magnitude of Vertical Sinusoidal Whole-Body Vibration

Influence of Frequency on Difference Thresholds for Magnitude of Vertical Sinusoidal Whole-Body Vibration Industrial Health 2002, 40, 313 319 Original Article Influence of Frequency on Difference Thresholds for Magnitude of Vertical Sinusoidal Whole-Body Vibration Yasunao MATSUMOTO 1 *, Setsuo MAEDA 2 and

More information

Protect Your Hearing

Protect Your Hearing S-76 Purdue University Cooperative Extension Service West Lafayette, IN 47907 Protect Your Hearing F. R. Willsey Professor Emeritus of Agricultural Engineering Most people think of farming as the quiet

More information

The Ear. The ear can be divided into three major parts: the outer ear, the middle ear and the inner ear.

The Ear. The ear can be divided into three major parts: the outer ear, the middle ear and the inner ear. The Ear The ear can be divided into three major parts: the outer ear, the middle ear and the inner ear. The Ear There are three components of the outer ear: Pinna: the fleshy outer part of the ear which

More information

Hearing. and other senses

Hearing. and other senses Hearing and other senses Sound Sound: sensed variations in air pressure Frequency: number of peaks that pass a point per second (Hz) Pitch 2 Some Sound and Hearing Links Useful (and moderately entertaining)

More information

A Consumer-friendly Recap of the HLAA 2018 Research Symposium: Listening in Noise Webinar

A Consumer-friendly Recap of the HLAA 2018 Research Symposium: Listening in Noise Webinar A Consumer-friendly Recap of the HLAA 2018 Research Symposium: Listening in Noise Webinar Perry C. Hanavan, AuD Augustana University Sioux Falls, SD August 15, 2018 Listening in Noise Cocktail Party Problem

More information

Noise and hearing - children and teenagers

Noise and hearing - children and teenagers Noise and hearing - children and teenagers http://www.cyh.com/healthtopics/healthtopicdetails.aspx?p=114&np=304&id=1584#2 The inner ear (cochlea) contains tiny cells that are sensitive to sound (hair cells).

More information

noise induced Working Together to Prevent Hearing Loss

noise induced Working Together to Prevent Hearing Loss noise induced hearing loss (NIHL) Working Together to Prevent Hearing Loss NOISE INDUCED HEARING LOSS Noise and its Effects Noise is a serious and widespread problem in many New Brunswick workplaces. Over

More information

Hearing Loss. How does the hearing sense work? Test your hearing

Hearing Loss. How does the hearing sense work? Test your hearing Hearing Loss You may have hearing loss and not even be aware of it. People of all ages experience gradual hearing loss, often due to the natural aging process or long exposure to loud noise. Other causes

More information

SUBJECT: Physics TEACHER: Mr. S. Campbell DATE: 15/1/2017 GRADE: DURATION: 1 wk GENERAL TOPIC: The Physics Of Hearing

SUBJECT: Physics TEACHER: Mr. S. Campbell DATE: 15/1/2017 GRADE: DURATION: 1 wk GENERAL TOPIC: The Physics Of Hearing SUBJECT: Physics TEACHER: Mr. S. Campbell DATE: 15/1/2017 GRADE: 12-13 DURATION: 1 wk GENERAL TOPIC: The Physics Of Hearing The Physics Of Hearing On completion of this section, you should be able to:

More information

Hearing Conservation Program

Hearing Conservation Program Hearing Conservation Program 1.0 Scope and Application The following procedures describe procedures for assessing and controlling excessive occupational noise exposure as directed by University policy

More information

how we hear. Better understanding of hearing loss The diagram above illustrates the steps involved.

how we hear. Better understanding of hearing loss The diagram above illustrates the steps involved. How we hear Better understanding of hearing loss begins by understanding how we hear. The diagram above illustrates the steps involved. 1. Sound waves are collected by the outer ear and channeled along

More information

Become a good listener LESSON PLAN / MARCH 2015 SPONSORED BY

Become a good listener LESSON PLAN / MARCH 2015 SPONSORED BY Become a good listener LESSON PLAN / MARCH 2015 SPONSORED BY WHO KNOWS WHAT HEARING IS? Hearing, auditory perception, or audition is the ability to perceive sound by detecting vibrations, changes in the

More information

Bone Conduction Microphone: A Head Mapping Pilot Study

Bone Conduction Microphone: A Head Mapping Pilot Study McNair Scholars Research Journal Volume 1 Article 11 2014 Bone Conduction Microphone: A Head Mapping Pilot Study Rafael N. Patrick Embry-Riddle Aeronautical University Follow this and additional works

More information

Auditory Physiology PSY 310 Greg Francis. Lecture 29. Hearing

Auditory Physiology PSY 310 Greg Francis. Lecture 29. Hearing Auditory Physiology PSY 310 Greg Francis Lecture 29 A dangerous device. Hearing The sound stimulus is changes in pressure The simplest sounds vary in: Frequency: Hertz, cycles per second. How fast the

More information

PSY 310: Sensory and Perceptual Processes 1

PSY 310: Sensory and Perceptual Processes 1 Auditory Physiology PSY 310 Greg Francis Lecture 29 A dangerous device. Hearing The sound stimulus is changes in pressure The simplest sounds vary in: Frequency: Hertz, cycles per second. How fast the

More information

How high-frequency do children hear?

How high-frequency do children hear? How high-frequency do children hear? Mari UEDA 1 ; Kaoru ASHIHARA 2 ; Hironobu TAKAHASHI 2 1 Kyushu University, Japan 2 National Institute of Advanced Industrial Science and Technology, Japan ABSTRACT

More information

PC BASED AUDIOMETER GENERATING AUDIOGRAM TO ASSESS ACOUSTIC THRESHOLD

PC BASED AUDIOMETER GENERATING AUDIOGRAM TO ASSESS ACOUSTIC THRESHOLD Volume 119 No. 12 2018, 13939-13944 ISSN: 1314-3395 (on-line version) url: http://www.ijpam.eu ijpam.eu PC BASED AUDIOMETER GENERATING AUDIOGRAM TO ASSESS ACOUSTIC THRESHOLD Mahalakshmi.A, Mohanavalli.M,

More information

Health and Safety at the Workplace Noise and Vibration Limits

Health and Safety at the Workplace Noise and Vibration Limits Noise and Vibration Limits EU occupational safety directives transposed into German national law Increased safety and improved health protection at work Occupational safety directives require protection

More information

Effects of speaker's and listener's environments on speech intelligibili annoyance. Author(s)Kubo, Rieko; Morikawa, Daisuke; Akag

Effects of speaker's and listener's environments on speech intelligibili annoyance. Author(s)Kubo, Rieko; Morikawa, Daisuke; Akag JAIST Reposi https://dspace.j Title Effects of speaker's and listener's environments on speech intelligibili annoyance Author(s)Kubo, Rieko; Morikawa, Daisuke; Akag Citation Inter-noise 2016: 171-176 Issue

More information

Hearing Aids. Bernycia Askew

Hearing Aids. Bernycia Askew Hearing Aids Bernycia Askew Who they re for Hearing Aids are usually best for people who have a mildmoderate hearing loss. They are often benefit those who have contracted noise induced hearing loss with

More information

HEARING GUIDE PREPARED FOR HEARING HEALTH PROFESSIONALS HEARING.HEALTH.MIL. HCE_HealthProvider-Flip_FINAL02.indb 1

HEARING GUIDE PREPARED FOR HEARING HEALTH PROFESSIONALS HEARING.HEALTH.MIL. HCE_HealthProvider-Flip_FINAL02.indb 1 HEARING GUIDE PREPARED FOR HEARING HEALTH PROFESSIONALS HCE_HealthProvider-Flip_FINAL02.indb 1 In both on- and off-duty settings, hearing is an important element of life. ON DUTY Situational awareness

More information

College of Medicine Dept. of Medical physics Physics of ear and hearing /CH

College of Medicine Dept. of Medical physics Physics of ear and hearing /CH College of Medicine Dept. of Medical physics Physics of ear and hearing /CH 13 2017-2018 ***************************************************************** o Introduction : The ear is the organ that detects

More information

Ear Exam and Hearing Tests

Ear Exam and Hearing Tests Ear Exam and Hearing Tests Test Overview A thorough evaluation of a person's hearing requires an ear exam and hearing tests. In children, normal hearing is important for language to develop correctly.

More information

Health and Safety at the Workplace Noise and Vibration Limits

Health and Safety at the Workplace Noise and Vibration Limits Noise and Vibration Limits EU occupational safety directives transposed into German national law. Increased safety and improved health protection at work. Occupational safety directives require protection

More information

Consonant Perception test

Consonant Perception test Consonant Perception test Introduction The Vowel-Consonant-Vowel (VCV) test is used in clinics to evaluate how well a listener can recognize consonants under different conditions (e.g. with and without

More information

Auditory model for the speech audiogram from audibility to intelligibility for words (work in progress)

Auditory model for the speech audiogram from audibility to intelligibility for words (work in progress) Auditory model for the speech audiogram from audibility to intelligibility for words (work in progress) Johannes Lyzenga 1 Koenraad S. Rhebergen 2 1 VUmc, Amsterdam 2 AMC, Amsterdam Introduction - History:

More information

LISTEN! You might be going deaf DEPARTMENT OF LABOUR TE TARI MAHI OCCUPATIONAL SAFETY & HEALTH SERVICE

LISTEN! You might be going deaf DEPARTMENT OF LABOUR TE TARI MAHI OCCUPATIONAL SAFETY & HEALTH SERVICE LISTEN! You might be going deaf OCCUPATIONAL SAFETY & HEALTH SERVICE 1 DEPARTMENT OF LABOUR TE TARI MAHI GET THE ANSWERS ABOUT HOW NOISE AFFECTS YOU. Issued by the Occupational Safety & Health Service,

More information

Digital Noise-Cancellation Headphones Senior Project Proposal. Korey Adams EE Class of 2016

Digital Noise-Cancellation Headphones Senior Project Proposal. Korey Adams EE Class of 2016 Digital Noise-Cancellation Headphones Senior Project Proposal Korey Adams EE Class of 2016 1 Summary This proposal is for the design of a pair of digital noise-cancelling headphones. These headphones will

More information

The effect of wearing conventional and level-dependent hearing protectors on speech production in noise and quiet

The effect of wearing conventional and level-dependent hearing protectors on speech production in noise and quiet The effect of wearing conventional and level-dependent hearing protectors on speech production in noise and quiet Ghazaleh Vaziri Christian Giguère Hilmi R. Dajani Nicolas Ellaham Annual National Hearing

More information

NOISE CONTROL AND HEARING CONSERVATION PROGRAM

NOISE CONTROL AND HEARING CONSERVATION PROGRAM NOISE CONTROL AND HEARING CONSERVATION PROGRAM R1 PAGE 1 OF 13 TABLE OF CONTENTS 1.0 INTRODUCTION 2.0 SCOPE AND APPLICATION 3.0 CRITERIA FOR NOISE EXPOSURE 3.1 Individual Exposure 3.2 Noise Areas 4.0 PROGRAM

More information

Everything you need to stay connected

Everything you need to stay connected Everything you need to stay connected GO WIRELESS Make everyday tasks easier Oticon Opn wireless accessories are a comprehensive and easy-to-use range of devices developed to improve your listening and

More information

WELCOME TO OUR OFFICE

WELCOME TO OUR OFFICE WELCOME TO OUR OFFICE A GUIDE TO BETTER HEARING EVERY DAY OUR VISION Our mission is to help people with hearing loss reach their full hearing potential. Helping more people hear better. Life is worth hearing.

More information

Hearing. By Jack & Tori

Hearing. By Jack & Tori Hearing By Jack & Tori 3 Main Components of the Human Ear. Outer Ear. Middle Ear. Inner Ear Outer Ear Pinna: >Visible part of ear and ear canal -Acts as a funnel to direct sound Eardrum: >Airtight membrane

More information

How Do Our Ears Work? Quiz

How Do Our Ears Work? Quiz The Marvelous Ear How Do Our Ears Work? Quiz 1. How do humans hear sounds? 2. How does human hearing work? Sketch and label the system. 3. Do you know any sensors that detect sound and how they might do

More information

Minimum Training Guidelines Surveillance Audiometry

Minimum Training Guidelines Surveillance Audiometry Date: January 2018 Due for review: January 2023 General foreword This document is one of a family of BSA, which also includes Otoscopy & Impression Taking, Aural Care, Ear Examination and Basic Audiometry

More information

An Examination on Required Sound Levels for Acoustic Warning Devices for Quiet Vehicles

An Examination on Required Sound Levels for Acoustic Warning Devices for Quiet Vehicles QRTV, UN/ECE/WP.29, Berlin 27-29 Sep., 2010 An Examination on Required Sound Levels for Acoustic Warning Devices for Quiet Vehicles Katsuya Yamauchi Assistant Professor, Faculty of Engineering, Nagasaki

More information

inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering August 2000, Nice, FRANCE

inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering August 2000, Nice, FRANCE Copyright SFA - InterNoise 2000 1 inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering 27-30 August 2000, Nice, FRANCE I-INCE Classification: 6.3 PSYCHOLOGICAL EVALUATION

More information

Hearing Conservation Program

Hearing Conservation Program Hearing Conservation Program Table of Contents I. Program Goals and Objectives... 2 II. Scope and Application... 2 III. Regulatory Authority and Related Information... 2 IV. Definitions... 2 V. Responsibilities...

More information

Infant Hearing Development: Translating Research Findings into Clinical Practice. Auditory Development. Overview

Infant Hearing Development: Translating Research Findings into Clinical Practice. Auditory Development. Overview Infant Hearing Development: Translating Research Findings into Clinical Practice Lori J. Leibold Department of Allied Health Sciences The University of North Carolina at Chapel Hill Auditory Development

More information

Cochlear Implant The only hope for severely Deaf

Cochlear Implant The only hope for severely Deaf Cochlear Implant The only hope for severely Deaf By: Dr. M. Sohail Awan, FCPS (ENT) Aga Khan University Hospital, Karachi - Pakistan For centuries, people believed that only a miracle could restore hearing

More information

Subjective impression of copy machine noises: an improvement of their sound quality based on physical metrics

Subjective impression of copy machine noises: an improvement of their sound quality based on physical metrics Subjective impression of copy machine noises: an improvement of their sound quality based on physical metrics Osamu Takehira a Ricoh Co. Ltd., JAPAN Sonoko Kuwano b Seiichiro Namba c Osaka University,JAPAN

More information

ID# Final Exam PS325, Fall 1997

ID# Final Exam PS325, Fall 1997 ID# Final Exam PS325, Fall 1997 Good luck on this exam. Answer each question carefully and completely. Keep your eyes foveated on your own exam, as the Skidmore Honor Code is in effect (as always). Have

More information

Clinical applications of otoacoustic emissions in Industry. Prof. Dr. B. Vinck, MSc, PhD University of Ghent, Belgium

Clinical applications of otoacoustic emissions in Industry. Prof. Dr. B. Vinck, MSc, PhD University of Ghent, Belgium Clinical applications of otoacoustic emissions in Industry Prof. Dr. B. Vinck, MSc, PhD University of Ghent, Belgium The 25th anniversary of the discovery of otoacoustic emissions (OAEs) [sounds that can

More information

Before taking field measurements, it is important to determine the type of information required. The person making the measurement must understand:

Before taking field measurements, it is important to determine the type of information required. The person making the measurement must understand: Why measure noise in the workplace? Measuring noise levels and workers' noise exposures is the most important part of a workplace hearing conservation and noise control program. It helps identify work

More information

Hearing. istockphoto/thinkstock

Hearing. istockphoto/thinkstock Hearing istockphoto/thinkstock Audition The sense or act of hearing The Stimulus Input: Sound Waves Sound waves are composed of changes in air pressure unfolding over time. Acoustical transduction: Conversion

More information

Sound Waves. Sensation and Perception. Sound Waves. Sound Waves. Sound Waves

Sound Waves. Sensation and Perception. Sound Waves. Sound Waves. Sound Waves Sensation and Perception Part 3 - Hearing Sound comes from pressure waves in a medium (e.g., solid, liquid, gas). Although we usually hear sounds in air, as long as the medium is there to transmit the

More information

Sound. Chapter Test A. Multiple Choice. 1 Pearson Education, Inc., or its affiliates. All rights reserved.

Sound. Chapter Test A. Multiple Choice. 1 Pearson Education, Inc., or its affiliates. All rights reserved. _ Sound Chapter Test A Multiple Choice Write the letter of the correct answer on the line at the left. _ 1. Sound is a disturbance that travels through a medium as a a. longitudinal wave. b. surface wave.

More information

Protect Your Hearing!

Protect Your Hearing! Protect Your Hearing! What is noise? Loud sounds if they are over 85 db can be damaging. How do I know if I am listening to levels above 85dB? It is invisible, tasteless, odorless, and IGNORED as a form

More information

Noise and Fishing Vessels

Noise and Fishing Vessels Noise and Fishing Vessels 1988/15/FG The object of this data sheet is to provide a simple picture of the very complex subject of noise, its presence on fishing vessels and its effect on fishermen. What

More information

NC Employees Workplace Program Requirements for Safety and Health. Hearing Conservation

NC Employees Workplace Program Requirements for Safety and Health. Hearing Conservation Scope NC Employees Workplace Program Requirements for Hearing Conservation The employer shall administer a continuing, effective hearing conservation program, whenever employee noise exposures equal or

More information

Hearing. Figure 1. The human ear (from Kessel and Kardon, 1979)

Hearing. Figure 1. The human ear (from Kessel and Kardon, 1979) Hearing The nervous system s cognitive response to sound stimuli is known as psychoacoustics: it is partly acoustics and partly psychology. Hearing is a feature resulting from our physiology that we tend

More information

managing safely Noise at Work Course Notes Mark Mallen Group Health and Safety Manager December 2005 Noise at Work: Version 1 Page 1 of 23

managing safely Noise at Work Course Notes Mark Mallen Group Health and Safety Manager December 2005 Noise at Work: Version 1 Page 1 of 23 Noise at Work Course Notes Mark Mallen Group Health and Safety Manager December 2005 Noise at Work: Version 1 Page 1 of 23 Course Content 1. What is noise? 2. Sound - Sound Waves 3. How do we hear? - The

More information

Chapter 17 Sound Sound and Hearing. Properties of Sound Waves 1/20/2017. Pearson Prentice Hall Physical Science: Concepts in Action

Chapter 17 Sound Sound and Hearing. Properties of Sound Waves 1/20/2017. Pearson Prentice Hall Physical Science: Concepts in Action Pearson Prentice Hall Physical Science: Concepts in Action Chapter 17 Sound Standing Waves in Music When the string of a violin is played with a bow, it vibrates and creates standing waves. Some instruments,

More information

An Introduction to Hearing Loss: Examining Conductive & Sensorineural Loss

An Introduction to Hearing Loss: Examining Conductive & Sensorineural Loss Sacred Heart University DigitalCommons@SHU Speech-Language Pathology Faculty Publications Speech-Language Pathology Spring 2017 An Introduction to Hearing Loss: Examining Conductive & Sensorineural Loss

More information

Glossary For Parents. Atresia: closure of the ear canal or absence of an ear opening.

Glossary For Parents. Atresia: closure of the ear canal or absence of an ear opening. Glossary For Parents This is not a complete or comprehensive glossary of audiologic and medical terms. It does include many technical and often unfamiliar terms that parents may hear used in connection

More information

ID# Exam 2 PS 325, Fall 2003

ID# Exam 2 PS 325, Fall 2003 ID# Exam 2 PS 325, Fall 2003 As always, the Honor Code is in effect and you ll need to write the code and sign it at the end of the exam. Read each question carefully and answer it completely. Although

More information

5. Which word refers to making

5. Which word refers to making Name: Date: WEEK 6 1 Read the text and then answer the questions. How do people hear? Look in a mirror, and you will see that your ears are shaped a little like a funnel. That shape amplifies sounds you

More information

SOUTHERN UTAH UNIVERSITY S WRITTEN HEARING CONSERVATION PROGRAM December 2017

SOUTHERN UTAH UNIVERSITY S WRITTEN HEARING CONSERVATION PROGRAM December 2017 SOUTHERN UTAH UNIVERSITY S WRITTEN HEARING CONSERVATION PROGRAM December 2017 1.0 PURPOSE: The objective of the Southern Utah University hearing conservation program is to minimize occupational hearing

More information

E4061 Hearing Conservation: Are You Listening, Jim? Leader s Guide

E4061 Hearing Conservation: Are You Listening, Jim? Leader s Guide E4061 Hearing Conservation: Are You Listening, Jim? Leader s Guide ARE YOU LISTENING, JIM? This easy-to-use Leader s Guide is provided to assist in conducting a successful presentation. Featured are: INTRODUCTION

More information

Drexel-SDP GK-12 ACTIVITY

Drexel-SDP GK-12 ACTIVITY Activity Template Subject Area(s): Sound Associated Unit: None Associated Lesson: None Activity Title: How good is your hearing? Grade Level: 8 (7-9) Activity Dependency: None Time Required: 120 minutes

More information

AA-M1C1. Audiometer. Space saving is achieved with a width of about 350 mm. Audiogram can be printed by built-in printer

AA-M1C1. Audiometer. Space saving is achieved with a width of about 350 mm. Audiogram can be printed by built-in printer Audiometer AA-MC Ideal for clinical practice in otolaryngology clinic Space saving is achieved with a width of about 350 mm Easy operation with touch panel Audiogram can be printed by built-in printer

More information

CONVENTIONAL AND DIGITAL HEARING AIDS

CONVENTIONAL AND DIGITAL HEARING AIDS CONVENTIONAL AND DIGITAL HEARING AIDS Coverage for services, procedures, medical devices and drugs are dependent upon benefit eligibility as outlined in the member's specific benefit plan. This Medical

More information

SOUND SOLUTIONS. Brought to you by ListenHear CUSTOM IN-EAR PRODUCTS

SOUND SOLUTIONS. Brought to you by ListenHear CUSTOM IN-EAR PRODUCTS SOUND SOLUTIONS Brought to you by ListenHear CUSTOM IN-EAR PRODUCTS When it comes to the highest quality sound technology, there s only one expert you Open up a new world of sound with ListenHear custom

More information

Hearing the Universal Language: Music and Cochlear Implants

Hearing the Universal Language: Music and Cochlear Implants Hearing the Universal Language: Music and Cochlear Implants Professor Hugh McDermott Deputy Director (Research) The Bionics Institute of Australia, Professorial Fellow The University of Melbourne Overview?

More information

The Handbook of Hearing and the Effects of Noise

The Handbook of Hearing and the Effects of Noise The Handbook of Hearing and the Effects of Noise Physiology, Psychology, and Public Health Karl D. Kryter San Diego State University San Diego, California Academic Press San Diego New York Boston London

More information

USING AUDITORY SALIENCY TO UNDERSTAND COMPLEX AUDITORY SCENES

USING AUDITORY SALIENCY TO UNDERSTAND COMPLEX AUDITORY SCENES USING AUDITORY SALIENCY TO UNDERSTAND COMPLEX AUDITORY SCENES Varinthira Duangudom and David V Anderson School of Electrical and Computer Engineering, Georgia Institute of Technology Atlanta, GA 30332

More information

Signals, systems, acoustics and the ear. Week 1. Laboratory session: Measuring thresholds

Signals, systems, acoustics and the ear. Week 1. Laboratory session: Measuring thresholds Signals, systems, acoustics and the ear Week 1 Laboratory session: Measuring thresholds What s the most commonly used piece of electronic equipment in the audiological clinic? The Audiometer And what is

More information

Hearing Conservation Program

Hearing Conservation Program Hearing Conservation Program Revised: September 2017 2009-2017. University of New Hampshire Office of Environmental Health and Safety. All rights reserved. The most current version of this document can

More information

Brad May, PhD Johns Hopkins University

Brad May, PhD Johns Hopkins University Brad May, PhD Johns Hopkins University When the ear cannot function normally, the brain changes. Brain deafness contributes to poor speech comprehension, problems listening in noise, abnormal loudness

More information

HearPhones. hearing enhancement solution for modern life. As simple as wearing glasses. Revision 3.1 October 2015

HearPhones. hearing enhancement solution for modern life. As simple as wearing glasses. Revision 3.1 October 2015 HearPhones hearing enhancement solution for modern life As simple as wearing glasses Revision 3.1 October 2015 HearPhones glasses for hearing impaired What differs life of people with poor eyesight from

More information

HEARING. Structure and Function

HEARING. Structure and Function HEARING Structure and Function Rory Attwood MBChB,FRCS Division of Otorhinolaryngology Faculty of Health Sciences Tygerberg Campus, University of Stellenbosch Analyse Function of auditory system Discriminate

More information

17.4 Sound and Hearing

17.4 Sound and Hearing You can identify sounds without seeing them because sound waves carry information to your ears. People who work in places where sound is very loud need to protect their hearing. Properties of Sound Waves

More information

Central Auditory System Basics and the Effects of Abnormal Auditory Input to the Brain. Amanda M. Lauer, Ph.D. July 3,

Central Auditory System Basics and the Effects of Abnormal Auditory Input to the Brain. Amanda M. Lauer, Ph.D. July 3, Central Auditory System Basics and the Effects of Abnormal Auditory Input to the Brain Amanda M. Lauer, Ph.D. July 3, 2012 1 Overview Auditory system tasks Peripheral auditory system Central pathways -Ascending

More information

Assistive Listening Technology: in the workplace and on campus

Assistive Listening Technology: in the workplace and on campus Assistive Listening Technology: in the workplace and on campus Jeremy Brassington Tuesday, 11 July 2017 Why is it hard to hear in noisy rooms? Distance from sound source Background noise continuous and

More information

Ambiguity in the recognition of phonetic vowels when using a bone conduction microphone

Ambiguity in the recognition of phonetic vowels when using a bone conduction microphone Acoustics 8 Paris Ambiguity in the recognition of phonetic vowels when using a bone conduction microphone V. Zimpfer a and K. Buck b a ISL, 5 rue du Général Cassagnou BP 734, 6831 Saint Louis, France b

More information

ILLINOIS STATE UNIVERSITY HEARING CONSERVATION PROGRAM

ILLINOIS STATE UNIVERSITY HEARING CONSERVATION PROGRAM ILLINOIS STATE UNIVERSITY HEARING CONSERVATION PROGRAM Revised 11/14/2013 Table of Contents 1. PURPOSE AND SCOPE... 2 2. RESPONSIBILITIES... 3 a. Employees... 3 b. Department Directors/Supervisors/Designees...

More information

INTRODUCTION TO AUDIOLOGY Hearing Balance Tinnitus - Treatment

INTRODUCTION TO AUDIOLOGY Hearing Balance Tinnitus - Treatment INTRODUCTION TO AUDIOLOGY Hearing Balance Tinnitus - Treatment What is Audiology? Audiology refers to the SCIENCE OF HEARING AND THE STUDY OF THE AUDITORY PROCESS (Katz, 1986) Audiology is a health-care

More information

TOLERABLE DELAY FOR SPEECH PROCESSING: EFFECTS OF HEARING ABILITY AND ACCLIMATISATION

TOLERABLE DELAY FOR SPEECH PROCESSING: EFFECTS OF HEARING ABILITY AND ACCLIMATISATION TOLERABLE DELAY FOR SPEECH PROCESSING: EFFECTS OF HEARING ABILITY AND ACCLIMATISATION Tobias Goehring, PhD Previous affiliation (this project): Institute of Sound and Vibration Research University of Southampton

More information

Product Model #: Digital Portable Radio XTS 5000 (Std / Rugged / Secure / Type )

Product Model #: Digital Portable Radio XTS 5000 (Std / Rugged / Secure / Type ) Rehabilitation Act Amendments of 1998, Section 508 Subpart 1194.25 Self-Contained, Closed Products The following features are derived from Section 508 When a timed response is required alert user, allow

More information

IMPACT OF ACOUSTIC CONDITIONS IN CLASSROOM ON LEARNING OF FOREIGN LANGUAGE PRONUNCIATION

IMPACT OF ACOUSTIC CONDITIONS IN CLASSROOM ON LEARNING OF FOREIGN LANGUAGE PRONUNCIATION IMPACT OF ACOUSTIC CONDITIONS IN CLASSROOM ON LEARNING OF FOREIGN LANGUAGE PRONUNCIATION Božena Petrášová 1, Vojtech Chmelík 2, Helena Rychtáriková 3 1 Department of British and American Studies, Faculty

More information

Hearing Conservation and Noise Control

Hearing Conservation and Noise Control Hearing Conservation and Noise Control Objectives What is sound? How the ear works How to measure noise What the Regulations say about noise Reading hearing tests Hearing Protection What is Sound? Hertz

More information

Vision Painting Inc. Safety Management System

Vision Painting Inc. Safety Management System HEARING / NOISE CONSERVATION 1. INTRODUCTION Written in 1983, the OSHA Hearing Conservation Standard (29CFR1910.95 Occupational Noise Exposure) requires that employers implement a hearing conservation

More information

FUNNELS OF SOUND. Activity Pack. Explore how sound travels using ear defenders and funnels to create giant ears. Neurosciences and Mental Health

FUNNELS OF SOUND. Activity Pack. Explore how sound travels using ear defenders and funnels to create giant ears. Neurosciences and Mental Health FUNNELS OF SOUND Activity Pack Description: Duration of Activity: Age: Topic: Key words: Resources: Related Activities: Explore how sound travels using ear defenders and funnels to create giant ears No

More information

INTERNATIONAL MODULE SYLLABUS W503 NOISE MEASUREMENT AND ITS EFFECTS

INTERNATIONAL MODULE SYLLABUS W503 NOISE MEASUREMENT AND ITS EFFECTS OHTA INTERNATIONAL MODULE SYLLABUS W503 NOISE MEASUREMENT AND ITS EFFECTS Aim Learning Outcomes To provide the student with an appreciation of the nature of noise hazards in the workplace and the effects

More information

The world s first digital mini receiver

The world s first digital mini receiver The world s first digital mini receiver Comfort Digisystem Receiver DT10 The Receiver DT10 is a mini receiver with Comfort Digisystem s unbeatable sound quality. It s easy to use, easy to configure and

More information

Activity Template. Drexel-SDP GK-12 ACTIVITY

Activity Template. Drexel-SDP GK-12 ACTIVITY Drexel-SDP GK-12 ACTIVITY Activity Template Subject Area(s): Sound Associated Unit: None Associated Lesson: None Activity Title: How good is your hearing? Grade Level: 8 (7-9) Activity Dependency: None

More information

Binaural Hearing for Robots Introduction to Robot Hearing

Binaural Hearing for Robots Introduction to Robot Hearing Binaural Hearing for Robots Introduction to Robot Hearing 1Radu Horaud Binaural Hearing for Robots 1. Introduction to Robot Hearing 2. Methodological Foundations 3. Sound-Source Localization 4. Machine

More information

PSY 214 Lecture # (11/9/2011) (Sound, Auditory & Speech Perception) Dr. Achtman PSY 214

PSY 214 Lecture # (11/9/2011) (Sound, Auditory & Speech Perception) Dr. Achtman PSY 214 PSY 214 Lecture 16 Topic: Sound, Auditory System & Speech Perception Chapter 11, pages 270-289 Corrections: None Announcements: CD is available outside Dr Achtman s office if you would like to see demonstrations

More information

Smart Connected Hearing NEXT GENERATION HEARING PROTECTION

Smart Connected Hearing NEXT GENERATION HEARING PROTECTION Smart Connected Hearing NEXT GENERATION HEARING PROTECTION Hearing Exposure A Growing Concern 2 1 Noise induced hearing loss causes no pain, no evident trauma, and leaves no visible scars 2 Work Conditions

More information

Music and Hearing in the Older Population: an Audiologist's Perspective

Music and Hearing in the Older Population: an Audiologist's Perspective Music and Hearing in the Older Population: an Audiologist's Perspective Dwight Ough, M.A., CCC-A Audiologist Charlotte County Hearing Health Care Centre Inc. St. Stephen, New Brunswick Anatomy and Physiology

More information

Communication with low-cost hearing protectors: hear, see and believe

Communication with low-cost hearing protectors: hear, see and believe 12th ICBEN Congress on Noise as a Public Health Problem Communication with low-cost hearing protectors: hear, see and believe Annelies Bockstael 1,3, Lies De Clercq 2, Dick Botteldooren 3 1 Université

More information

Hearing. PSYCHOLOGY (8th Edition, in Modules) David Myers. Module 14. Hearing. Hearing

Hearing. PSYCHOLOGY (8th Edition, in Modules) David Myers. Module 14. Hearing. Hearing PSYCHOLOGY (8th Edition, in Modules) David Myers PowerPoint Slides Aneeq Ahmad Henderson State University Worth Publishers, 2007 1 Hearing Module 14 2 Hearing Hearing The Stimulus Input: Sound Waves The

More information

Occupational Noise Exposure 29 CFR

Occupational Noise Exposure 29 CFR Occupational Noise Exposure 29 CFR 1910.95 Is There a Problem? More than 30 million Americans are exposed to hazardous sound levels on a regular basis 10 million have suffered irreversible noise induced

More information

San Diego State University Environmental Health and Safety

San Diego State University Environmental Health and Safety Occupational Hearing Conservation Program (HCP) Making Hearing Health a Workplace Wellness Priority Lake Health Walter Vieweg, DO, D.PM., M.A. Occupational Physician Certified NRCME, MRO, Civil Surgeon,

More information

Hearing Conservation Program. Santa Clara University 500 El Camino Real Santa Clara, CA 95053

Hearing Conservation Program. Santa Clara University 500 El Camino Real Santa Clara, CA 95053 Hearing Conservation Program Santa Clara University 500 El Camino Real Santa Clara, CA 95053 December 10, 2013 Program Approval Signature on file in the EHS Office 5/19/10 Signature Date Joe Sugg Assistant

More information

ADHEAR The new bone-conduction hearing aid innovation

ADHEAR The new bone-conduction hearing aid innovation ADHEAR The new bone-conduction hearing aid innovation MED-EL has world-wide launched a new kind of hearing aid, ADHEAR, for people who have an hearing impairment and want to prevent surgery. This little

More information

3882 Hearing Conservation Training for Employees. Leader s Guide ERI Safety Videos

3882 Hearing Conservation Training for Employees. Leader s Guide ERI Safety Videos 3882 Hearing Conservation Training for Employees Leader s Guide 2008 ERI Safety Videos HEARING CONSERVATION TRAINING FOR EMPLOYEES This easy-to-use Leader s Guide is provided to assist in conducting a

More information

Two ears are better than one.

Two ears are better than one. Two ears are better than one. Two ears for a reason. Hearing with both ears, as nature intended, is called binaural hearing. It allows us to hear sounds accurately and more naturally. Especially in noisy

More information